ОС_Лаба3

#include <windows.h>
#include <tchar.h>
#include <stdlib.h>
#include <ctime>

bool flag = true;

void OpenTxte() //функция открытия блокнота
{
	// Create empty process startup info.
	STARTUPINFO sInfo;
	ZeroMemory(&sInfo, sizeof(STARTUPINFO));

	// Reserve memoryt for process information.
	PROCESS_INFORMATION pInfo;

	// Create process.
	CreateProcess(L"C:\\Windows\\Notepad.exe",
		NULL, NULL, NULL, FALSE, NULL, NULL, NULL, &sInfo, &pInfo);
}


LRESULT CALLBACK myWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
        case WM_CLOSE:  //Выход из программы
            PostQuitMessage(0);
            return 0;
	case WM_PAINT:                   //Смена цвета окна на рандомное
			if (GetAsyncKeyState(VK_RETURN)){
				HDC         hdc;
				PAINTSTRUCT ps;
				RECT        rc;
				HBRUSH hBrush;
				int a = rand()%256, b = rand()%256, c = rand()%256;
				hdc = BeginPaint(hWnd, &ps); //начинаем рисовать
				GetClientRect(hWnd, &rc); //получаем координаты окна
				hBrush = CreateSolidBrush(RGB(a, b, c));    //создаём новую кисть
				FillRect(hdc, &rc, hBrush); //рисуем
				EndPaint(hWnd, &ps); //заканчиваем рисовать
			}
			return 0;
    }

    return DefWindowProc(hWnd, uMsg, wParam, lParam);
}

void main()
{
	srand(time(NULL));
	// Get the handler of module that will be associated with a window.
	// In this case it will be handler of the executable file of current process.
	HINSTANCE hInstance = GetModuleHandle(NULL);

	// Create brush that will fill the background of the window.
	HBRUSH hBrush = CreateSolidBrush(RGB(0, 0, 255));

	// Create window class.
	WNDCLASS winClass;
	winClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
    winClass.lpfnWndProc = (WNDPROC)myWndProc;
    winClass.cbClsExtra	= 0;
    winClass.cbWndExtra = 0;
    winClass.hInstance = hInstance;
    winClass.hIcon = LoadIcon(NULL, IDI_WINLOGO);
    winClass.hCursor = LoadCursor(NULL, IDC_ARROW);
    winClass.hbrBackground = hBrush; //Цвет окна
    winClass.lpszMenuName = NULL;
    winClass.lpszClassName = L"MyWindowclass";

	// Register class in the system.
	RegisterClass(&winClass);

	// Create window.
	HWND hWnd = CreateWindow(L"MyWindowclass", L"Window by raw API",
                             WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
                             100, 100, 320, 240,
                             NULL, NULL, hInstance, NULL);

	// Show window.
	ShowWindow(hWnd, SW_SHOW);

	// Loop while window is not closed.
	MSG message;
	while (true)
	{
		if (PeekMessage(&message, NULL, 0, 0, PM_REMOVE))
		{
			if (message.message == WM_QUIT)
				break;
			else
			{
				TranslateMessage(&message);
				DispatchMessage(&message);
			}
		}
		if (GetAsyncKeyState(VK_CONTROL)){
			if (GetAsyncKeyState('Q')){ DestroyWindow(hWnd); UnregisterClass(L"MyWindowclass", hInstance); DeleteObject(hBrush); WM_QUIT; break; }
		}
		if (GetAsyncKeyState(VK_ESCAPE)){ DestroyWindow(hWnd); UnregisterClass(L"MyWindowclass", hInstance); DeleteObject(hBrush); WM_QUIT; break; }
		if (GetAsyncKeyState(VK_RETURN)){
			WM_PAINT;
		}

		if (GetAsyncKeyState(VK_LSHIFT)){
			if (GetAsyncKeyState('C') && flag){
				flag = false;
				OpenTxte();
			}
		}
	}
	// Delete window.
	DestroyWindow(hWnd);

	// Remove window class.
	UnregisterClass(L"MyWindowclass", hInstance);

	// Delete brush.
	DeleteObject(hBrush);

}